The 3.3V line on these little USB-to-serial boards usually is not powerful enough to keep the ESP32 alive... have you tried with an external 3.3V power supply? Thank you very much for your answer. It was a smart guess and I actually didn't thought about it *blushing* The TTGO serial output actually...

Soldered another TTGO with the lowest temperature settings, still the same problem. This is the 5th one with this problem. I ordered the TTGOs from two different shops… Connecting........_____....._____....._____....._____....._____....._____....._____ A fatal error occurred: Failed to connect to ES...

Hey, I finally received some new TTGOs, soldered everything, and… same result… :( My setup is the same as mentioned above. I soldered wires onto a new TTGO and connected it to the CP2102. I also exposed the EN and GPIO0 pin so I can ground these pins manually. CP2102 TX (yellow) <-> (green) TTGO RX ...

Still no luck :( I guess you're right, maybe they are broken, maybe I damaged them when soldering. They are definitely not easy to solder. However, I always checked if I didn't solder two pins together and if there is a connection between the CP2102 pins and the TTGO pins by using a multimeter. So, ...

Thanks again for your help! I quickly ordered a pack of USB to TTL (CP2102) converted and received them today. My setup Hardware TTGO 3.3V <-> CP2102 3.3V TTGO Gnd <-> CP2102 Gnd TTGO TX <-> CP2102 RX TTGO RX <-> CP2102 TX TTGO Rst/En <-> Gnd (closed by using a button) TTGO GPIO0 <-> Gnd (closed by ...

@chegewara, thanks a lot for your quick response! I somehow made a mistake in the schema by connecting the wrong Tx <-> Tx and Rx <-> Rx (didn't know there were actually another Tx and Rx :oops:). I'm already connecting IO1/Tx to IO1/Tx and IO3/Rx to IO3/Rx. I've already tried 2 different ESP32 dev ...

Update : See how everything worked out at https://www.esp32.com/viewtopic.php?f=2&t=16108&start=10#p68843 ############################################### Hi forum! I'm currently working on a project where space is limited. The only microcontroller small enough is a TTGO Micro 32. They seem to be ve...